A dab of anti-seize costs less than a seized nut.

Two anaerobic threadlockers cover nearly everything. Medium removable for the screws you expect to take out again with a normal wrench. High strength for studs, set screws on shafts and anything you would rather heat than have back out. Both cure in the absence of air between metal threads, so a bottle left open on the bench does not go off, and a screw that is not seated does not lock.

Plated parts and stainless cure slower than bare steel. On zinc or 18-8, give it a full day before load, or use a primer. The reply tells you which.

Anti-seize is the opposite job. Copper for steel in heat. Nickel for stainless, where copper can stain and where 18-8 on 18-8 run dry and fast will gall and weld itself to the nut. That is the single most common stainless call we get: a seized 3/8 nut on a 316 rail bolt. Anti-seize changes the torque-to-tension relationship, so drop your torque figure when you use it.